Safety elevator attachment.



n.'w uNN|NG. SAFETY ELEVATGR ATTACHMENT.

9 APPLICATION FILED AUG-30. 1915. Patented De@ 19 l. 2 SHEETS-VSHEETT.

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R. WUNNING. 'SAFETY ELEVATOR ATTACHMENT.

APPLICATION FILED Ammo. 191s. I

' Patented Dec. 19,1916.

' 2 SHEET s E 2 @l @CMM/M Richard Wzmnmg www? me.

RICHARD WUNNING, or NEW roer. 1r. Y- 'l SAFETY ELEVATOR ATTACHMENT.'

specification of Let-ters "Patient Patented Dec. 19,1916.

Applicationnleaaugusjfsdiei; serial no. 49,Q91

To all whom t may concern.'

' Be itknown that I, RICHARDVUNNYIN'G, a citizen of the United States, and residing at New York, inthe county of NewYorl'r and State of New York, have invented certain new and useful Improvements in ySafety Elevator Attachments, of which the follow ing is a specification, such as will enable those skilled in the art to which it appertains to make. and use the same.

This invention relates to-elevators, and particularly to passenger elevators, and the object thereof is to provide. a; device of this class with a simple and eflicient attachment to prevent thel serious and sometimes fatal accidents, which result from the breaking of the hoisting cable or apparatusandthe drop-of the car to the bottom of the elevator shaft; a further object being to provide a safety elevator' apparatus or attachmentwhichwill also operate tov stop thedescent of the elevator car at a predetermined point or at any floor of the building in which the car may be operated; a still further object being to provide a safety 4elevator attachment for elevator cars, of the class specified, with means which may also b e operated to stopj the descent of the car yat any particular point in the shaft in which the car is used; and with these and other objects in view, the invention consists in an apparatus of the class specified, constructed and `operating as hereinafter described and claimed. The invention is fully disclosed in the following specication, ofwhich theaccomf panying drawings, v form a part, in which the separate parts of my improvement are designated by suitable reference characters Ain each of the views and in whichf-- Figure l is a sectional view showingtlie bottom of an elevator car and my improved apparatus applied thereto and indicating they method of its operation; Fig. 2 a partial section on the line 3 3 of Fig. l; Fig. 3.a view similar to Fig. l but showing the parts in a different p osition; Fig. 4 a view similar to Fig. 2 but showing amodii'cation anden the line H of Fig. 5; Fig. 5a side view of the construction shown irl-Fig. 4t; Figgfiy a view similar to Fig. l', but showino' another modification F 7 @Side view o the construction shown in Fig. 6 with part of said construction shown in section ;A Fig.V 8;V aview similar to, Fig. l but showing onlypart of the construction and showing -a modification; Fig. 9 a view ,sim'll'l 'to F but I shaft Z), and in a showing the a different position',

and Fig. 1 0 aviewsimilar to Fig. l, but showing only part YofV the construction and shQwing' a n io ,dificationv In the drawing forming part of. this Specification, I have Shawn at d the bottom of anelevator car which ismovable in a ver# ticalshaft in the usual manner and at the opposite sides 0f which are vertical brake or stopy rails a? and.' these railsfare. preferably of 'IT-form. in cross section and may form a part of' the yguide railsl between'which the car is movable; Y y

The elevatorV car or the bottom thereof is provided with a hanging frame a? of any suitable construction and provided Withl a horizontal base member aj* and mounted vertically in the frame a3 and centrallyy of the car 4isha threaded shafgt thetop lend portion of which isy provided with a reduced extension b2 having a'bearing in the bottom of lthe car and above'whichA is an yangular head b3 te which a wrench may be applied to turn said shaft as Vhereinafter described. The shaft Z), is alsol provided at; its lower endwith a reduced portion b4 having a suitahlebearing bf', in thebottom L? ofthe frame d?, thefuppfer part be 4( )ffthef reduced lover end extsoaof the/Shaft b is ar-A gular in form and mounted thereon isa clutchmemher' t? provided with a .conical top bs and a cylindrical bottomclutch huhbf;

Mounted on the bottom eXtenSOIr of the horizontal position is a 0k having 1 Clutch hub beveled gear wheel member 0 2 which operatesin connection with the4 clutch hub member i and `2,11? one side., of the frame d3 is mounted a horizontal shaft 03- having at its inner end al beveled gear c4 which meshes withthevgea'r o, and which is provided at itsouter end with a gear 015 which meshes with a vertical rack bar'cat one side ofi the elevatorshaft and supported'in any desired manner, l ably supported by hangers c7 connected with the car o'r the floor thereof.

The governor shaft d is mounted one side portion of the" frame a3 opposite the shaft c3, and the upper end. thereof is provided with a bearing in the floor of the car at Zvand on the lower end thereof is mountr ed a horizontal gear alswhich meshes with a gear d10 mounted under the gear-c, andl the gear Z3 provided on the lower side. thereof with av huh Z4 having a bearing in thel bot#y and the 'Shaft c3 is preferv am. of rae frame fr., yarlaxial erf, als? Y l e with which is connected a link c2 provided on the top thereof with a clutch hub member Z5.

The central portion Z6 7of the shaft Z is angular in form and is provided with a clutch member Z7 which operates in connection with the clutch member d5, and said shaft Z is also provided with a governor Z8 of the usual form and involving a vertically movable sleeve or collar Zo mounted on the angular part ZG of the shaft Z.

The frame 'a3 Vinvolves a horizontal por# tion a5 on which is rotatably mounted a disk which is also connected with the sleeve or collar (Z9 of the governor 78, and connected with the top portion of thedisk e is a slotted arm e3 and connected with the lower inner portion of the disk eis a slotted ,arm c4, and pins or similar devices c5 are passed through the slots in the arms e3 and e4 and into the part a5 of the frame a3, and the inner ends of the arms e3 and et are provided with heads 6 which are j preferably forked and which are supported in a horizontal,position and which operate in connection with the clutch member 7)? as hereinafter described.

Mounted on the threaded shaft b is a nutshaped collar or block to which are pivoted brake arms ff", said arms being provided at their inner ends with fork-shaped heads f3 which inclose the collar or block f and said arms are also supported by supplemental arms f4 pivoted to or in the bo-ttom a of the car, and the arms f2 are forked at their outer ends so as to engage the webmembers of the vertical brake or stop rails t2 as shown at f5.

The operation of this construction will be readily understood from the foregoing description, and when taken in connection with the accompanying drawing and the following statement: The position of the parts Yshownin Fig. l is the normal position, and

in this position, thehead of the arm e4 is under the beveled head 728 of the clutch member 727 and said clutch member is held above and out'of engagement with the clutch member 02. In the downward movement of the car, under normal conditions, the shaft c3 will be rotated and this shaft will rotate the gear Z3 and the shaft Z and its governor will also be rotated, by the clutch member Z2 which engages the clutch member Z5. This operation of these parts will continue unless the elevator cable or apparatus used for raising and lowering the elevator fails and breaks, in which event the car would start downward much more rapidly than under normal condition, and this would increase the speed of the governor d8, and the disk e would be turned so as to withdraw the head of the arm c4 from beneath the head of the clutch member 57, and said clutch member 67 would drop into engagement with the clutch member 02, and in this operation the head e of the arm e3 aids in forcing the clutch member Z97 downwardly. This operation will also result Vin rotating the shaft 7) and the collar or block f will be lowered on saidy shaftV and the inner ends of the brake arms f2 will be forced downwardly and the outer ends thereof outwardly and into close contact or engagement with the rails a2, and this operation will stop the descent of the car as will be readily'understood, and this position of the parts is clearly indicated in Fig. 2, and the parts of theapparatus may be reset or returned to the normal position as shown in Fig. l as hereinafter described.

In Figs. 4 and 5 I have shown a modified form of the brake arms f2, or rather of the means by which said arms engage the brake rails a2, and in this form of construction the bottom of the car is provided with hanger rods g on which are mounted, and vertically movable with the car, clamping jaws g2, consisting of separate parts connected by the rods g. The jaws g2 are adapted at their outer ends to engage the webs of the brake rails a? as shown at g3, and the arms are pivoted on horizontal rods g4 supported bcneath the car in any manner, and the outer ends of said arms are free and tapered and curved downwardly as shown at g5, and said ends operate between the inner under portions g 0f the jaws g2, as clearly indicated in'Fig. 4L, and if the hoisting cable or apparatus should break at any time and the car drop'or fall, the inner ends of the arms f2 will be moved downwardly and the outer ends upwardly and laterally and the jaws g2 would be caused to grasp and hold the rails a? and the descent of the car will be stopped as will be readily understood.

In the construction shown in Fig. 7, lf substitute vfor the screwshaft b a plain shaft 7a, the lower end portion 72,2 of which is angular in form the same as the threaded shaft 79. Secured on the top portion of the shaft Zt isa beveled gear 71,3 and the shaft 71, passes through a frame member 7# supported beneath the car and in place of the brake arms 2, l employ two brake shafts 71,5, provided at their inner ends with bearings in the frame member 7L, and with beveled gears 7L which mesh with the gear 7b3, and the outer end portions of the shafts 72,5 are provided with horizontally movable wedge members 7L7 which are movable in keepers 71,8 supported beneath the bottom of the car in any way, and the wedge members 7L7 are pro-A vided with threaded bores and the outer ends of the shafts 71.5 are threaded into said bores. With this construction, the downward drop of the car in case of the breakage of the hoisting cable or apparatus will rapidly rotate the shaft 7L in the same manner as shaft 79 with the construction shown in Figs. 1 and 2, and this operation will rotate the shafts h5, and the wedge members 71,7 will be forced outwardly between the inner ends bear onthe guide of the jaws'g2 as indicated Iin Fig. 6,andthe car will be brought to a stop, as -will be readily understood.

In Figs 8 and 9 I have shownjmeans for stopping a carat or about a floor level. in-

stead of midway between` floor, levels, and

this means is employed in connection with the parts shown in Figs. l and 2,7but may be employed'in connection with anykind or class of brake arms such as are shown-.in Figs. l to 3, or in Figs. 4L. to 7, inclusive. In Figs. 8 and 9 I have shown at al vertical guide at one side of the elevatorshaft, and this guide may be of` any kind or class and maybe one of car. rIhe guid adjacent to each Hoor of the building., with an inwardly directed `lug, projection or shoulder 2, and supported in hangers 3,

Vsuspended beneath the bottom of.` the car is Va horizontally movable bar 4 'provided at adapted to and .to the. innery end of which is pivoted at 6 anL L-'shaped arm 7 which is pivoted to a hanger 3 at "3 and the lower or shorter end of the L-shaped arm 7 is provided with` a head Qwhich is preferably forked and which is adapted to engage the clutch member' 67 and t0 lit under the conical head thereof as clearly shownuin Fig. 8. Abell crank j is pivoted to one of the hangers 3 at j2 and onerend` thereof is slotted and a pin j* is passed therethrough into the bar 4, and suspended from the other end of the bell crank j. is a'weight ji", which normally serves to hold the bar 4E andthe arm 7 in the position shown in Fig. 8, and as long as these parts are'in the position shown in said figure the clutch members orA devices o7 and c2 cannot operate as hereinbefore described, and the descent of the car cannot be stopped even thoughthe governor (Z8 may already have withdrawn the arm e? from its operative position as shown in Fig. 2, but as soon, as the car reaches the lug, shoulder or projection 2, the bar 4 and its connected parts willy be thrown into the position shown in Fig. 9, ifi-which vposition the clutch member Zis released and engagesthe clutch member c2, and from this position the parts may be returned to the position shown in Fig. 8 after the breakage has been repaired by simply returning the clutch memberand governorto their normal position as shown in Fig. l, as well as the brake arms f?, and the descent of the car will return the bar 4 to the posi-tion shown in Fig. 8 as will be readilyv understood.

The construction shown in Fig. l0 is intended as a supplemental stop for the car in case the mechanism shown in Figs. 1 to 2 inclusive,l or'anyv part thereof should break under great strain, and in this form of construction Ij provide horizontal bars 7e at vthe opposite sides ofthe elevator shaft orsaid its outer end with a roller 5 the guides for the elevator e is provided `preferably the framework thereof and any desired" number of ysaid beams may be employed, and `be regularly*spacedbetweenthe top and. bottomof said shaft.'V y Ink this formof construct-ion I provide thebottom a. ofthe car, With hangers 262 vin whichy are mountedlhori'-` Y zontally movable bars /cthe innerl ends of Whichare provided with Alinks cwhich aref pivoted to the nut-shaped collar or blockjf, or the fork-shapedheads fiof the brake arms f2 and the outer endsof the bars/c,3V are' adapted to operate in connection with or bear `on the beams 7c as indicated in dotted lines. In the normal position ofthese parts as shown infull'lines,thejbars do notengage thebeams 7c, but if in the operation of the parts herein shown andjdescribed in checking thedescent ,ofthe car, any partof said parts should break after the `governor has completed its operation, or-l whenV said parts are under their greatest strain,I the bars v7.93y which have already been projected, will act as astop for said car, orin other words, the bars- 7c3 are projected at all times in the operation ofthe safety attachment as` will 'be readily understood, but'said bars will not act as stops 'unless the brake arms f2 should fail to stop the car in itsjdownwardY movement due 'to ,the breakage of said bars orparts connected therewith. In order to reset the parts ofthe brake apparatus after they have been .throwninto the posi-v tion shown in- Figq2- as hereinbefore described, all that is necessary is to return the clutch member Z2? to the position shown in Fig. l after whicha wrench can be applied to the head 3 of the shaft b and turn. Vitto the right. p This operation willraise` the block or collar. f and the inner ends ofthe brake varms f2 and release the pressure of said armsf2 on thebrake 'raijlsa2 asvvilll be understood.v p y The constructionjshownin Fig. l0 may ybe used to support the car before the safety device is reset, should the break which causes the sudden descent ofthe 'car be so serious thatthe repairing thereof would take con,- siderable time and this can be accomplished by turning the shaft b to the right enough topermit the car to descend slightly until the bars k3 reach the first beams lc at which point the car may be supported for `any length of time without any; strain on the various parts of my safety device. y p' While I have shown and described the preferred construction 'of the various details o f my improvement, it will be apparent that my invention is not limited thereto, and changes therein and: modifications thereof maybe made, within the scope-of `the arpended claims, without departing from the spirit of myinvention or sacrificing its advantages.` K l v @Having fully described, .my invention,

lio

- gear, a vertical governor lower end portionv the governor shaft what I claim as new and desire to secure by Letters Patent, is zy 1. A safety attachment for elevator vcars comprising a hanger frame connected with the bottom of the car, a vertical and rotatable main shaft mounted therein, a vertical rack bar at one side of the shaft, a horizontal shaft supported beneath the car' and provided at its outer end with a gear which meshes with said rack bar and at itsv inner end with a beveled gear, a beveled gear rotatably mounted on the bottom part of the main shaft and meshing with the last named beveled gear and provided on its top surface with a clutch member, a supple mental clutch member vertically movable on the main shaft, and adapted to operate in connection with the clutch member on said shaft, a gear rotatably mounted on the thereof, a corresponding gearvon the main shaft and adapted to mesh with said last named gear and provided on its top surface with a clutch member, a supplemental clutch member vertically movable on the governor shaft and adapted to operate in connection with the clutch member on the last named governor device mounted on the governor shaft and comprising a vertically mov able part, a rotary device mounted between and the main shaft and in operative connection with said vertically movable part, clutch member controlling de vices mounted between the'rotary device and the main shaft and in operative connection with the rotary device and having a horizontal movement and adapted to operate in l connection with` the clutch memberfmounted on the main shaft, vertically arranged brake rails and radially arranged brake members adapted to be operated by the main shaft and operating in connection with said verti-` cally arranged brake rails at the opposite sides of the elevator shaft.

2. A safety attachment for elevator cars comprising a hanger frame suspended beneath the car, a vertically arranged rack bar at one side of the elevator shaft, vertically arranged brake rails at the opposite sides of the elevator'shaft, a main central shaft rotatably and vertically mounted in said frame, radially arranged brake devices in operative connection with said shaft and operating in connection with said brake rails, a horizontal shaft suspended beneath the car and provided atits outer end with a gear which meshes with said rack bar and at its inner end with a beveled gear, a beveled gear rotatably mounted on the lower end portion of the main shaft and meshing with the beveled gear on the horizontal shaft, a vertical governor shaft, a gear mounted on the lower end portion thereof, a corresponding gear on the main shaft, and adapted to mesh with said last named gear,

' bar, a

a governor device mounted on the governor shaft, and devices whereby too rapid downward movement of the car will operate the brake devices to stop said movement.

3. A safety attachment for elevator cars comprising a central vertical shaft rotatably supported beneath the car, vertical brake rails at the opposite sides of the elevator shaft, radially arranged brake devices in operative connection with said shaft and adapted to operate in connection with said vertical brake rails, devices whereby the too rapid descent of the car will thro-w said brake devices into operation and stop the downward movementl of the car, means whereby the downward movement of the car will be stopped at a predetermined point, .and supplemental stop devices whereby the downward movement of the car will be checked if the first named devices should break or fail tooperate.

Ll; A safety attachment for elevator cars comprising a frame, a vertical threaded shaft rotatably mounted therein, vertically yarranged brake rails, brake devices mounted on the threaded portion of said shaft and adapted to engage said rails, a vertical rack horizontal shaft provided with a gear which meshes with said rack bar, a gear mounted on said horizontal shaft adjacent to said vertical shaft, a corresponding gear loosely mounted on said vertical shaft and adapted to engage the gear on said horizontal shaft, a governor shaft geared in connection with the gear the vertical shaft, a governor device mounted on the governor shaft, means for operating the governor in one direction only, and devices in operative connection with the vertical shaft and the governor whereby the too rapid descent ofthecar will operate the governor and said rlast named devices to rotate said shaft and operate the brake devices to stop the descent of the car.

5. A safety attachment for elevator cars, comprising vertically arranged brake rails, a vertical threaded shaft, a'blocl movable on the threaded portion of said shaft, radially arranged brake devices the inner ends of which are connected with said block, the

outer ends of said brake devices being adapted to engage said rails, a gear loosely mounted on said shaft, means for operating said gear, means for causing said gear to rotate said shaft to move said block longitudinally thereon, and means operated by the descent of the car for controlling said last named means.

6. A safety attachment for elevator cars, comprising vertically arranged brake rails, a vertical threaded shaft, a block movable on the threaded portion of said shaft, radially arranged brake devices-the inner ends of which are connected with said block, the outer ends of said brake devices being loosely mounted on 5 brake trolling said last named means.

Inftestimony that I claim the foregoin Gones ofthis patent may'be obtained for five ce Washi devices into operation,V and means operated by the descent of thecar forV cony as my invention I have si gned my name in I g presence of the subscribing Witnesses thisv V10 d 27th day of August, 1915. d j

Witnesses: y

C. MULREANY, g` I-I. E. THoMPsoN.

nts eaehq by addressing the ngton, D. G. o

RICHARD WUN N IN G. y

.Gommissioner of Patents, 

